Best Buy takes 50% off a selection of Prima Games strategy guides. That puts prices between $19.99 and $24.99. Opt for in-store pickup to avoid a $3.99 shipping fee. (Or, spend $35 or more for free shipping.) Score guides for Fallout 4, The Legend of Zelda: Twilight Princess, The Witcher 3, Pokemon Sun & Moon, and more. Deal ends April 24.